Valve seat



Sept. 8, 1931. F. E. SMITH VALVE SEAT Filed Oct. 25, 1926 l/ :33113 l 'l' Patented Sept; 8,; 1931A VALVE saar Application illedv October 23, 1526. Serial No. 1435-160.v

This invention aims to-provide novel means for holding in place'a valve seat in a cylinder head or other part of the frame of an internal combustion engine, the device being 5 of peculiar utility in connection Withreneweing the seat for a poppet valve'iny an internal' combustion engine.

It is within the province of the disclosure to improve generally andto enhance the util- L, ity o devices of that type to which the in-` vention appertains.

With the above and other objects in view whichwill appear as thek description proceeds, the invention resides in the combina-4 tion andv arrangement of parts and 1n the details of construction hereinafter described and claimed, it being understoodthat changes in the precise embodiment of the invention herein disclosed, may be made Within thev scope of whatlis claimed, Without departing from the spirit of the invention.

In the drawings engine frame wherewith the device forming 2: the subject matter Vof this application has been assembled, parts appearing in elevation;

through the seat for the valve.

The numeral 1 marks any suitable part of the frame of an internal combustion engine, the piston appearing at 2 and the poppet valve at 3, the valve being carried by a stem 4 mounted to reciprocate in the frame 1.

When it becomes necessary to renew the seat for the valve 3, an annular recess 5 is formed in the frame 1, the outer Wall of the recess 5 being provided with a continuous circumferential groove 6. The seat 7 is in the form of a ring and-is internally beveled as at 8 to cooperate with the bevel 9 of the.

valve 3. The seat ory ring 7 has a very close fit, perhaps a driving fit, in the recess 5, and

this, of itself, aids in holding the seat or ring 7 in the recess. An additional or positive means is supplied for retaining the valve seat 7 in the recess 5, and with this end in View, the seat ring 7 is supplied on its outer surface with a continuous circumferential A10`in the'seat ring 7 will be disposed directly Figure 2 is a transverse section takengroovey 10.r This groovelO is located aty such' a distance from one end surface 11 of the seat ring 7 that, When the surfaceA 7 abuts against the Wall 12 ofthevrece'ssV 5, the groove oppositeV to the groove 6, Before the seat 55 Vring 7 is insertedinto'the recess, the groove' 6v andthe groove 10 are filled' with a cement which will harden, the cement being refractory, soY that jit Will withstand the heat of internal combustion'. After the seat'ring 7 is placed in they recess 5, in the positionshown inl Figure 1, the cement in the` groove 10 coalesces with the cement in the` groove 6` to form a continuousring 14 of cement which is interlocked or interengaged with the seat 7- and with the frame 1V of the engine, tohold the seatZ in place.

What is claimed is i l 1. Infan internal combustion engine,avalve housing formed with a. recess, a valve seat member adaptedor close lit reception Within Figure 1 shows in section, a part of anl said recess, both said valve seat member and said valve housing being formed with complementary grooves, the valve seat member in its operative position Within said recess having contact at its side with the side wall of said recess at both sides of said grooves, and a cement confined between said grooves for locking the seat to the said valve housing. 2. In an internal combustionf'zengine, in combination, a valve housing formed with a recess, the Wall defining the side of said recess having a groove opening into said recess, a shoulder at the inner end of said recess, and a valve seat member adapted for a disposition within said recess, said valve seat member'being of a size to snugly fit said re cess and when operatively disposed therein having its-inner end abutting-said shoulder and its side engaging the side wall of the re cess at both sides of the groove in said side Wall, said valve seat member having anv exterior side groove disposed for alinement with the first mentioned groove when the inner end 95 of the valve seat member is disposed against said shoulder, whereby separate bodies of plastic cement which are adapted to be placed in. the respective' grooves prior to inserting the valve seatmember in the recess are adapted to unite With one another to form a lock to retain the valve seat member in the recess. 3. In combination, a valve housing formed with a recess, the Wall defining the side-of 5 said recess having a groove opening into said recess, and a valve seat member adapted for disposition within said recess, said valve seat member being of a size to snugly fit said recess and when operatively disposed therein having its side face engaging the side Wall of said recess at both sides of the groove in said side Wall, said groove being adapted to receive cement for retaining the valve seat member within said recess. 4. In combination, a valve housing formed with a recess deiined in part by a side wall, and a valve seat member adapted for disposi. tion within said recess, said valve seat member having a groove opening through the side face thereof and said member being of a size to snugl fit said recess and to contact at its side Wit the side Wall of the recess at both sides of said groove when said member is operatively disposed within said recess, said groove being adapted to receive cement for retaining the valve seat member within said recess.

In testimony that I claim the foregoing as my own, I have hereto axed my signature.

FRED E. SMITH. 

